Portable grinding and resurfacing device



P 1931- i W.-P. MEISSNER 3 1,823,371

.PORTABLE GRINDING AND RESURFACING DEYIE Filed June 28, 1929 WP? ims'n er nez MW Patented Sept. 15, 1931 UNITED STATES WILLIAM P. IVIEISSNER, OF CUERO, TEXAS PORTABLE GRINDING AND B-EidURFACING DEVICE Application filed June 28,

The present invention is directed to improvements in portable grinding and resurfacing devices.

The primary object of the invention is to provide a device of this character so constructed that the breaker points of a distributer can be easily and quickly ground or refaced without removing the breaker points from the distributer case.

Another object of the invention is to pro-- vide a device of this kind capable of grinding or resurfacing the opposed breaker points simultaneously.

Another object of the invention is to provide adevice of this character wherein a motor is used as a power unit, current for operating the motor being furnished from the battery of the automobile.

Another object of the invention is to provi-de a device of this kind Which is light in Weight, portable, simple in construction, durable, and effective in operation.

' YVith these and other objects in view, this invention resides in the novel features of construction,formation, and novel arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of the device. Figure 2 is a plan View, partly in section.

, Referring to the drawings, the numeral 1 designates a casing of any suitable shape and material and in which is mounted a motor 2,

the shaft 3 of which'extends through the front wall of the casing.

The shaft 3 has fixed thereto a head 4- in which is formed an axial socket 5, rectangular in cross section.

. A block 6 is suitably secured to one end of the casing for supporting the frame 7 said frame comprising angularly disposed arms 8 and 9, the former having an angularly (llS- posed ear 10 carried thereby which abuts the outer end of the block 6. A cap screw 11 secures the ear to they block in order to hold the'arm 8 of the frame engaged longitudi- ,nally upon the block.

The arm 9 has a plate12 carried thereby which is provided with a cross plate 13 hav- 1929. Serial No. 374,575.

the arm 9 supports a casing 15 in one wall of which is ournaled the outer end of the driving shaft 16, said shaft being journaled intermediate its ends in the bearing 14-. The inner end of the shaft is squared, as at 17, for removably engaging the socket 5. The shaft 16 has fixed to its outer end the beveled gear 18 which meshes with the similar gear 19 fixed to the inner end of the shaft 2-0 journaled in one wall of the casing, said shaft having removably engaged thereon a grinding or refacing disc 21. These discs are readily removable and, as shown, thedisc is of the metallic type having both sides coated with any well known abrasive material.

Current is furnished the motor through the conductors 22 having clamps 23 carried by their terminals.

When a disc is used having its faces insulated by the abrasive material, it is necessary that one clamp be connected to the positive or insulated side of the battery circuit and the other engaged with a metallic part of the, frame in order to close a circuit through the motor.

If desired, discs may be used wherein the abrasive material is lacking and the faces thereof being milled in the manner of a file, and in which instance it will be only necessary to secure one of the clamps 23 to any part of the battery circuit since the disc will be grounded through the breaker points, as

- will be obvious.

. In operation, the breaker points of the distributer are spread and the disc engaged therebetween, and during rotation of the disc both contact points will be simultaneously ground and reface and without the necessity of removing the breaker points from the distributer.

Should the battery of the car be dead, the conductors can be connected to a six volt battery. Thus, is will be seen that the device can be used in rural districts wherein electric current is not available.

Since the frame 7 can be removed upon displacement of the cap screw 11, a new frame can be conveniently substituted for one which may become broken. Thus, a new frame can be applied without discarding the motor. a

Obviously, when the frame is applied, the squared end of the shaft 16 will engage in i the socket 5 to provide a rigid driving connection from the motor shaft.

A switch 24 is carried by the casing 1 and is of a well known construction and is operable to control the operation of the motor.

From the foregoing, it is thought that the operation, and many advantages of the herein described invention will be apparent to those skilled in the art without further description, and it will be understood that minor changes in thesize, shape, proportion and minor details of construction may be resorted to Without. departing from the spirit or sacrificing any of the advantages of the invention.

l/Vhat is claimed is A portable tool for grinding and resurfacing breaker points of a distributer without removing said points from the distributer casing, comprising acasing, a motor in the 25 easing adapted to be operated from the ignition battery of an automobile, a radially disposed ri-b on, one end wall of the casing, an arm extending forwardly from the rib and having a base portion directed along the rib 39 and then terminally bent over the end of the rib, a. screw detachably securing; said end to the end of the rib, a shaft carried by the arm, a grinder disk supported by the arm and geared to one end, of said shaft, and a shaft 35 for the motor projecting through said end of the casing and having a terminal bearing receiving a squared end formed on the firstnamed shaft whereby removal of said screw permits of dissasembly of the arm and driving shaft from said casing and motor shaft.

In testimony whereof I'aflix my signature.

-WILLIAM P. MEISSNER. [1,. s.] 

